Arnold Bregt

SDI from a technological perspective: Architecture

Do you know this building?

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Architecture design

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Construction

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Building regulations and standards

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Content

Architecture for buildings Design Components Standards

Architecture for SDI Overall design Components Standards

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Comparison bestween buildings and SDI’s Design for Building

to Construct

using Material and

Methods Constrained by

Standards

Design for SDI to

Implement using

Software tools based on

Standards

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IT Architectures

Service Oriented Architecture (SOA)

Client-Sever Architecture

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Client-server Architecture

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Example e-mail

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Service Oriented Arichtecture• Geoportal

webapplication

• Catalog service

• Search mechanism

• Source database

• Metadata editor

• Services

• Internet explorer

• GIS software

Example: Cheaptickets

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SDI Architecture

Definition:Structure of the system, which is formed by its components, their properties and the relationships and the interaction with the environment.

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Components (Béjar et al. 2009)

Components types (properties)

Connector Types

Constraints

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How to describe an Architecture?

It is free,but:

Try to be consistent and clear

Look at good examples (e.g. UML)

It must communicate the message

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Example: Geospatial portal OGC

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Example: SDI Galicia

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Example: North Rhine-Westphalia

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Example: GeoFoss

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SDI Architecture INPRIRE

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Software support for SDI

Con Terra - SDI suite

Geonetwork

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Case of the week

Your SDI as a technological infrastructure”

Please analyze the technological aspects of your case SDI. Concentrate on ICT architecture (SOA), standards and services used in your SDI case.

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Case of the week

With analyse we mean: Draft an architectural picture of your SDI (design

your own picture for your own SDI); Describe the components, standards and

software technologies used; Reflect on the standards and technologies used

(e.g. are they using the latest versions of the standards, what software tools are popular, etc).

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Case of the week

Create a Create a Table with standards and software tools used for your SDI.

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Standards (abbreviation)

Description Version(s)

....    

     

     

Software tools    

.......    

     

Case of the week

TIP 1: Study the paper of Béjar et al., 2009

TIP 2: Use OGC and ISO as a reference source for standards (ISO) and standards and software tools (OGC).

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Questions?

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UML

UML: Unified Modeling Language

2000 ISO Standard

Describe states and processes

Use for describing GI standards.

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UML

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Web Coverage service (WCS)

Technically, WCS Core establishes three request types, inline with the OGC Web Service definition: GetCapabilities: delivers an XML-encoded description

of service properties and the data holdings offered by the server inquired.

DescribeCoverage: delivers XML-encoded descriptions of coverages (such as their location in space and time).

GetCoverage: delivers a coverage (or part thereof), either as original data or processed, in some suitable data format.

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XML

Aspects

Extensible Markup Language (XML)

Human and Machine readable

Very popular

Example

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